The deadly 3.54-inch-long spider Atrax christenseni is among the most dangerously venomous spiders for humans.

The Sydney funnel-web spider has extremely dangerous venom, but according to a new study this spider is actually three different species — one of which, the "Newcastle big boy," is much larger.

The huge spider has dubbed “big boy” and are said to release “copious amounts of venom". The male species is most poisonous. Funnel-web spiders are renowned for their toxicity - and many are ...